/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.shardingsphere.scaling.core.utils;

import org.apache.shardingsphere.scaling.core.job.position.FinishedInventoryPosition;
import org.apache.shardingsphere.scaling.core.job.position.InventoryPosition;
import org.apache.shardingsphere.scaling.core.job.task.ScalingTask;
import org.apache.shardingsphere.scaling.core.job.task.inventory.InventoryDataScalingTask;
import org.apache.shardingsphere.scaling.core.job.task.inventory.InventoryDataScalingTaskGroup;

import java.util.List;
import java.util.function.Predicate;

/**
 * Scaling task util.
 */
public final class ScalingTaskUtil {
    
    /**
     * All inventory tasks is finished.
     *
     * @param inventoryDataTasks to check inventory tasks
     * @return is finished
     */
    public static boolean allInventoryTasksFinished(final List<ScalingTask<InventoryPosition>> inventoryDataTasks) {
        return inventoryDataTasks.stream().allMatch(each -> ((InventoryDataScalingTaskGroup) each).getScalingTasks().stream().allMatch(getFinishPredicate()));
    }
    
    private static Predicate<ScalingTask<InventoryPosition>> getFinishPredicate() {
        return each -> ((InventoryDataScalingTask) each).getPositionManager().getPosition() instanceof FinishedInventoryPosition;
    }
}
